Siemens SINUMERIK 840 User Manual page 82

4 Measuring Cycles for Turning Machines
4.1 L972/L982 Tool measurement
Tool types 28, 37 and 38, R23=x2x2
Using this varient, T slot cutters with two tool offset numbers can be measured.
With tool type 28, L1 and R of both tool offset numbers are determined.
With tool types 37 and 38, L1, L2 and R are determined.
Two consecutive offset numbers must be used. The 1st offset number is used for the greater
tool length. The 2nd offset number (1st offset number+1) is called automatically by the cycle.
In the tool geometry memory, the relevent tool dimensions L1, L2 and R must be stored in the
two offset numbers. When tool management is used for the SINUMERIK 850 or 840/880, the
1st offset number must also be loaded first.
First, the 1st measuring point is measured in the absessor and ordinate. The tool is then
swivelled by 180 degrees and the 2nd measuring point is measured at the same cutting edge
in the two axial directions.
Axial tool
Tool
Axial tool form
type
Measuring point 1
37
R
Measuring point 2
The average value of the tool measurements in the ordinate provides tool dimension L1 for
compensation 1 and 2.
Tool dimension L2 is measured separately for each compensation and stored. The cutter
radius is determined from half the dimensional difference between measuring point 1 and
measuring point 2 in the ordinate.
Calculation of tool geometry:
1st offset number
L1=(L1,1+L1,2)/2
L2=L2 (compensation 1)
R=ABS((L1,1 – L1,2)/2)
4–8
Tool geometry
L2
Compensation 1
F
Compensation 1
Compensation 2
L2
Compensation 2
2nd offset number
L1=(L1,1+L1,2)/2
L2=L2(compensation 2)
R=ABS((L1,1 – L1,2)/2)
©
Siemens AG 1990 All Rights Reserved
Dimension
dimensions compensation
Compensation 1
L1=0, L2, R L1, L2, R
Compensation 2
L1=0, L2, R L1, L2, R
SINUMERIK 840/850/880 (BN)
10.91
6FC5197- AB70